Fix `viewer-charts` context sharing and misc bugs #1750

Job	Run time
lint_and_docs (ubuntu-22.04, 3.11, 22.x)	10m 1s
build_js (ubuntu-22.04, 3.11, 22.x)	28m 3s
build_python (ubuntu-22.04-arm, aarch64, 3.11, 22.x)	14m 40s
build_python (ubuntu-22.04, x86_64, 3.11, 22.x)	18m 28s
build_emscripten_wheel (ubuntu-22.04, x86_64, 3.11, 22.x)	16m 46s
build_and_test_rust (ubuntu-22.04, x86_64, 22.x)	15m 30s
test_emscripten_wheel (ubuntu-22.04, x86_64, 3.11, 22.x)	2m 48s
test_python (ubuntu-22.04, x86_64, 3.11, 22.x)	1m 48s
test_python (ubuntu-22.04-arm, aarch64, 3.11, 22.x)	2m 8s
build_and_test_jupyterlab (ubuntu-22.04, x86_64, 3.11, 22.x)	2m 25s
test_js (ubuntu-22.04, 3.11, 22.x)	5m 59s
benchmark_python	0s
benchmark_js	-1s
test_python_sdist	0s
publish	0s
	1h 58m 35s

Provide feedback